public void HTTPPostRequest_UriFormatException_Test()
{
var endpointurl = "any wrong url";
var action = "checkouts";
var request = new GatewayCheckoutRequest();
var ex = Assert.Throws <UriFormatException>(() => _webAPIClient.HTTPPostRequest(endpointurl, action, request, ""));
Assert.IsTrue(ex.Message.Contains("Invalid URI: The format of the URI could not be determined"));
}